Revert "Fix a ton of compiler warnings."

chrome/browser/gtk/gtk_floating_container.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/gtk/gtk_floating_container.h"
 
 #include <gtk/gtk.h>
 #include <gtk/gtkprivate.h>
 #include <gtk/gtkmarshal.h>
 
@@ skipping 97 matching lines @@
                        G_MININT,
                        G_MAXINT,
                        0,
                        static_cast<GParamFlags>(GTK_PARAM_READWRITE)));
 
   floating_container_signals[SET_FLOATING_POSITION] =
       g_signal_new("set-floating-position",
                    G_OBJECT_CLASS_TYPE(object_class),
                    static_cast<GSignalFlags>(G_SIGNAL_RUN_FIRST |
                                              G_SIGNAL_ACTION),
-                   0u,
+                   NULL,
                    NULL, NULL,
                    gtk_marshal_VOID__BOXED,
                    G_TYPE_NONE, 1,
                    GDK_TYPE_RECTANGLE | G_SIGNAL_TYPE_STATIC_SCOPE);
 }
 
 static void gtk_floating_container_init(GtkFloatingContainer* container) {
   GTK_WIDGET_SET_FLAGS(container, GTK_NO_WINDOW);
 
   container->floating_children = NULL;
@@ skipping 182 matching lines @@
   child_info->x = 0;
   child_info->y = 0;
 
   gtk_widget_set_parent(widget, GTK_WIDGET(container));
 
   container->floating_children =
       g_list_append(container->floating_children, child_info);
 }
 
 G_END_DECLS